SESSILE-EYED SERIES 



3245 



cemented together with threads; while another species of the same genus (A. 

 littorina] makes a tube by cementing together the edges of a leaf of growing weed, 

 so as to make a tube open at both ends. Again, accord- 

 ing to Bates, Podoacerus capillatus "builds its nest in a 

 very bird-like manner in submarine forests; the nests con- 

 sist chiefly of fine thread-like material, woven and inter- 

 laced, being established firmly in the branches of zoophytes; 

 some small extraneous fragments are often bound with it, 

 but these appear more the result of accident than intention. 

 The form of the nest is somewhat oval, the entrance being 

 invariably at the top. These nests are evidently used as 

 places of refuge. ' ' 



In the tribe Caprellina the head has coalesced with the 

 first segment of the thorax, and the abdomen is reduced in 

 size, with most of its appendages wanting. The two principal families are the 

 Caprellidce or skeleton shrimps, and the Cyamida or whale lice. In the former the 



TRANSPARENT OCEAN SHRIMP, Cystosoma neptuni. 

 (Reduced. ) 



